Graduate School of Frontier Biosciences, Osaka University


Photophysics Laboratory

  Name Email TEL
Professor KIMURA, Shinichi, Ph.D. +81-6-6879-4600
Associate Prof. WATANABE, Junji, Ph.D. +81-6-6879-4602
Assistant Prof. OHTSUBO, Yoshiyuki, Ph.D. +81-6-6879-4604
Assistant Prof. WATANABE, Hiroshi, Ph.D. +81-6-6879-4604
FAX +81-6-6879-4603
Postal Mail Address Nonequilibrium Physics Group,
Graduate School of Frontier Biosciences, Osaka University,
1-3 Yamadaoka, Suita, Osaka 565-0871, Japan
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To clarify the mechanisms of the appearance of the order and function in nonequilibirum and biological systems, and contribute to the understanding of the physical origin in the macroscopic representation of the material properties.

1. Pattern Formation in Nonequilibrium Systems

We study the mechanisms of order and pattern formation processes under nonequilibrium conditions by means of linear and nonlinear laser spectroscopy. Particularly we try to investigate the physical mechanisms of femtosecond pulse formation process in a mode-locked laser, the instability in crystal growth, the pattern formation in Belousov-Zhabotinskii reaction, order formation process in choresteric phase of liquid crystal, ferroelastic domain formation and so on. We also clarify the mechanism of structural color, which is produced through the self-organization in nature.

2. Laser Spectroscopy of Fluctuation and Soft Mode

23_img4.jpgWe investigate the dynamical properties of disordered materials such as liquid, glass and biopolymers, and also investigate the soft mode behaviors in phase transitions by means of various spectroscopic methods in frequency- and time-domains such as Brillouin and Raman scattering spectroscopy, and optical Kerr effect spectroscopy. We then clarify how the cooperative phenomenon comes out in macroscopic systems.

3. Development of New Laser Techniques and New Spectroscopy

We develop new laser spectroscopy combining various frequency- and time-domain techniques. Particularly, we study a newly developed frequency-domain femtosecond four wave mixing technique. We apply it to the measurement of the dynamics in various materials and also to pulse diagnostic use. This method is suitable to measure a short-lived species because the measurement is completed within a few seconds and to cover a wide frequency region using two-color pump pulses. We also try to develop new laser spectroscopy, in which we can freely control the phase, frequency, intensity, and polarization of light pulses.